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oreodont

[awr-ee-uh-dont, ohr-]
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noun
  1. any of various extinct North American artiodactyls of the families Merycoidodontidae or Agriochoeridae, widespread from the late Eocene through early Miocene epochs.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018